The synthesis of 2,9-dibromo-4-(2-chlorophenyl)-6H-thieno[3,2-f]-1,2,4-triazolo[4,3-a]-1,4,diazepine (XX) has been carried out. The substitution reactions of XX with 1-(2-methoxyethyl) piperazine, 1-(3-methoxypropyl)piperazine, 1-(2-ethoxyethyl)piperazine and 1-(2-methylthiothyl)-piperazine afforded the title compound XXIV and its analogues XXV-XXVII. N-Alkylations of 2-bromo-4-(2-chlorophenyl)-9-piperazino-6H-thieno[3,2-f]-1,2,4-triazolo[4,3-a]-1,4-diazepine (XXIII) with 2-phenoxyethyl bromide and 2-phenylthioethyl bromide gave compounds XXVIII and XXIX. Cyclization of 5-(2-chlorophenyl)-2-hydrazino-3H-thieno[2,3-e]-1,4-diazepine(XVIIIa) by treatment with triethyl orthoformate resulted in 4-(2-chlorophenyl)-6H-thieno[3,2-f]-1,2,4-triazolo[4,3-a]-1,4-diazepine (XIX) which could be brominated only to the 9-bromo derivative XXI; attempts at further bromination to position 2 were unsuccessful. Some contribution to the syntheses of etizolam (I) and its dechloro analogue V in the stage of intermediates are being described. Compounds XXIV-XXIX were pharmacologically tested from the point of view of discoordinating and anticonvulsant activities; they proved less active than the analogous 8-chloro-6-(2-chlorophenyl)-1-piperazino-4H-striazolo[4,3-a]-1,4-benzodiazepines.
已完成2,9-二溴-4-(2-氯苯基)-6H-噻吩[3,2-f]-1,2,4-三唑并[4,3-a]-1,4-二氮杂蒽噻吩(XX)的合成。将XX与1-(2-甲氧基乙基)哌嗪、1-(3-甲氧基丙基)哌嗪、1-(2-乙氧基乙基)哌嗪和1-(2-甲硫基乙基)-哌嗪进行取代反应,得到了标题化合物XXIV及其类似物XXV-XXVII。将2-溴-4-(2-氯苯基)-9-哌嗪基-6H-噻吩[3,2-f]-1,2,4-三唑并[4,3-a]-1,4-二氮杂蒽噻吩(XXIII)与2-苯氧基乙溴化物和2-苯硫基乙溴化物进行N-烷基化反应,得到化合物XXVIII和XXIX。通过与三乙基正甲酸酯处理,5-(2-氯苯基)-2-叠氮-3H-噻吩[2,3-e]-1,4-二氮杂蒽噻吩(XVIIIa)环化,得到4-(2-氯苯基)-6H-噻吩[3,2-f]-1,2,4-三唑并[4,3-a]-1,4-二氮杂蒽噻吩(XIX),只能溴化成9-溴衍生物XXI;尝试进一步溴化至2位置未成功。在中间体阶段描述了对依替唑安(I)及其去氯类似物V的合成的一些贡献。从失调和抗惊厥活性角度对化合物XXIV-XXIX进行了药理学测试;它们证明比类似的8-氯-6-(2-氯苯基)-1-哌嗪基-4H-s-三唑并[4,3-a]-1,4-苯二氮杂蒽噻吩活性较低。